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Glyptemys valentinensis

Reptilia - Testudines - Emydidae

Taxonomy
Glyptemys valentinensis was named by Holman and Fritz (2001). Its type specimen is UNSM 76564, a carapace (mostly complete carapace), and it is a 3D body fossil. Its type locality is Valentine Railway Quarries, which is in a Barstovian terrestrial horizon in the Valentine Formation of Nebraska.

Synonymy list
YearName and author
2001Glyptemys valentinensis Holman and Fritz p. 325
2018Glyptemys valentinensis Vlachos

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
RankNameAuthor
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
Pantestudinoidea
superfamilyTestudinoidea
Panemydidae
familyEmydidaeRafinesque 1815
genusGlyptemys
speciesvalentinensis

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
E. Vlachos 2018Glyptemys valentinensis can be diagnosed as a member of Pan-Emydidae based on the full list of characters listed for that clade above and as a member of Glyptemys based on the presence of a bell-shaped entoplastron. Glyptemys valentinensis can be differentiated from Glyptemys insculpta by smaller size, a more flattened shell, anteriorly-directed carapace striations, lack of pyramidal carapace sculpturing, a less flared and unserrated posterior carapacial margin, a flat cervical scute, a V-shaped groove on the visceral side of the nuchal, and a wide vertebral I that contacts marginal II.